*{margin:0px;padding:0px}
a{text-decoration: none}
li{list-style: none}
.flex{display:flex}
.sb{justify-content: space-between}
.w33{width:33.333333%;}
.w25{width:25%}
.tc{text-align: center}
.tr{text-align: right}
body{background-color:#ececec;}
.wechatcolor{
    color:#8ac72e;
}
.reddot{
    width:16px;
    height:16px;
    line-height:16px;
    background:red;
    border-radius: 100%;
    position:absolute;
}
